HVAC Controls | McMaster-Carr

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Input Voltage

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Number of Terminals

For Use With

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Wire Connection

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DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

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Electrical Connection

Certification

C-UL Recognized Component

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CSA Certified

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ETL Listed

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UL Recognized Component

VDE Certified

Operation Type

Mechanical

Solid State

Switch Starting Position

Duct Size

Depth

Temperature Setting

300 Products

Electrical Power, Networking, and Controlling

Infrequent-Cycle Relays

Use with equipment that cycles on and off, such as HVAC systems

147 products

Relays

Electrically open and close circuits to control power to lights, motors, and other equipment

5 products

Proportional-Control Relays

Gradually adjust output instead of turning on or off

12 products

Heating, Ventilation, and Air Conditioning

Thermostats

Connect to heaters, fans, and air conditioners to control the temperature

46 products

Temperature-Controlled Outlet Adapters

Automatically turn heating and cooling devices on and off as temperatures rise and fall

3 products

Thermostat Guards

Restrict access to thermostats and protect them from damage

12 products

HVAC Switches

Control and monitor airflow in HVAC systems automatically

3 products

Duct Damper Actuators

Automatically adjust duct dampers to regulate airflow

5 products

HVAC Flame Detectors

Replace flame detectors in HVAC equipment such as furnaces, ovens, water heaters, and boilers

1 product

Flue-Gas Exhausters

Vent furnaces and other gas- or oil-fired equipment

8 products

Duct Airflow Dampers

Regulate airflow to sections of duct

20 products

Barometric Draft Dampers

Maintain consistent airflow in your furnace to improve its performance

6 products

Duct Fire Dampers

Automatically close at high temperatures to help prevent the spread of fire through duct

13 products

Safety Equipment

Smoke Detector Test Stations

Test hard-to-reach HVAC smoke detectors from a convenient location

1 product

Smoke Detectors

Warn people when there's smoke in your facility

6 products

Measuring and Inspecting

Smoke Pens

Produce smoke to observe airflow and detect leaks in HVAC systems; reusable, unlike smoke candles

2 products

Smoke Candles

Light the wick for a short burst of smoke to observe airflow and detect leaks in HVAC systems

4 products

Smoke Pellets

Detect airflow and leaks in HVAC systems near server rooms and other areas with electronics

4 products

Smoke Powder

No flame needed—release a burst of powder to detect airflow and leaks in HVAC systems

3 products